JP2010155460A - 複合炭素繊維基材、プリフォームおよび炭素繊維強化プラスチックの製造方法 - Google Patents
複合炭素繊維基材、プリフォームおよび炭素繊維強化プラスチックの製造方法 Download PDFInfo
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- JP2010155460A JP2010155460A JP2010029685A JP2010029685A JP2010155460A JP 2010155460 A JP2010155460 A JP 2010155460A JP 2010029685 A JP2010029685 A JP 2010029685A JP 2010029685 A JP2010029685 A JP 2010029685A JP 2010155460 A JP2010155460 A JP 2010155460A
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- reinforcing fiber
- base material
- nonwoven fabric
- composite
- fibers
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Abstract
【解決手段】強化繊維からなるシート状の強化繊維基材の少なくとも片面に、短繊維からなる不織布が積層され、該不織布を形成する短繊維が該強化繊維基材に貫通することにより、該強化繊維基材と該不織布が一体化されていることを特徴とする複合強化繊維基材。
【選択図】図2
Description
A.粒子径が小さく、粒子径が均一な熱可塑性粒子を製造するコストが高い。
B.これら粒子をプリプレグの樹脂表面に均一に付着させるため、プリプレグの加工速度が遅くなったり、またBステージ状態のマトリックス樹脂に粒子が分散した樹脂フイルムを作製するなどの別の新たな工程が必要となる。
C.プリプレグの製造および成形条件によっては粒子はプリプレグやプリプレグの樹脂を硬化した後のFRPの層内に入り、正確に所定の粒子を層間に配置させることは困難である。
D.プリプレグを使用してのオートクレーブ成形は、タックのあるプリプレグを使うから、プリプレグとプリプレグの間の空気を脱泡しながらの積層が必要であり、また所定の構造材の厚みにするには薄いプリプレグを何層も積層することが必要となり手間がかかる。
また、強化繊維からなるシート状の強化繊維基材の少なくとも片面に、不織布が積層され、該不織布を構成する繊維のうち5〜50重量%が低融点繊維であり、強化繊維基材と不織布が熱融着により一体化されている複合強化繊維基材を特徴とする。
Mi1:i番目の一体化手段の好ましい範囲の下限値
Mi2:i番目の一体化手段の好ましい範囲の上限値。
強化繊維基材として、繊度8000デシテックス、引張強度4800MPa、弾性率230GPa、破断伸度2.1%、フィラメント数12,000本の扁平状の炭素繊維糸を経糸、および緯糸に用い、経糸および緯糸の密度が1.25本/cm、織物目付200g/m2の二方向織物を用いた。
ここで、不織布の真の体積とは、不織布の単位面積当たりの重量/繊維比重、見掛け体積とは、不織布の厚み×単位面積である。不織布の単位面積当たりの重量は、不織布を1m×1mにカットし、研精工業株式会社製の化学天秤にて測定し、繊維比重はナイロンの比重を用いて算出した。また、不織布の厚みは、株式会社東洋精機製作所製のデジタル定圧厚さ測定器を用い、JIS L 1098に準じ、23.5kPaの圧力下で測定した。
用いた樹脂は3M社製エポキシ樹脂PR500で、110℃に樹脂を加熱して注入し、177℃×4時間で硬化させた。
不織布を一体化せず、炭素繊維のみを用いた以外は実施例1と同じ方法で基材を作成し、試験した結果を表1にまとめた。
不織布として、融点が260℃の高融点ナイロン100%からなる、目付が8g/m2のスパンボンドタイプ不織布を用い、ニードルパンチを掛けなかった以外は実施例1と同じ方法で複合基材を作成し評価した結果を表1に示した。
不織布として、融点が260℃の高融点ナイロン100%からなる、目付が48g/m2の高目付のスパンボンドタイプ不織布を用い、実施例1と同じ強化繊維基材とニードルパンチを掛けて一体化した基材を用い、以下実施例1と同じ方法で硬化板を作成、評価した結果を表1にまとめた。
実施例1に用いた強化繊維基材ならびに不織布を用い、ニードルパンチで一体化した後、ホットローラで不織布に含まれる低融点ナイロンの融点以上の温度に加熱・圧着させた一体化基材とし、以下実施例1と同じ方法で評価し、結果を表1にまとめた。
実施例1に用いた強化繊維基材と、不織布として融点が260℃の高融点ナイロン100%からなる、目付が8g/m2のスパンボンドタイプ不織布を用い、硬化剤を含まない、粘度が1.2poiscのエポキシ樹脂からなる粘着剤を2g/m2強化繊維基材の片面に塗布し、不織布と接着させて一体化させた。以下実施例1と同じ方法で評価し、結果を表1にまとめた。
不織布として融点が約140℃のナイロンからなる目付が10g/m2のメルトブロー長繊維不織布を用い、実施例1で用いたのと同じ強化繊維基材とホットローラによる加熱・圧着で接着させ、一体化基材とした。実施例1と同じ方法でコンポジット特性の評価を行い、結果を表1にまとめた。
強化繊維基材として、経糸に繊度8000デシテックス、引張強度4800MPa、弾性率230GPa、破断伸度2.1%、フィラメント数12,000本、糸幅6.5mmの扁平状の炭素繊維糸を、緯糸に繊度が225デシテックスのガラス繊維糸を使用し、経糸の密度が3.75本/cm、緯糸の密度が3.0本/cm、炭素繊維糸の目付が300g/m2、カバーファクターが99.7%の一方向織物を用いた。
繊維体積割合(Vf)評価用の硬化板は、実施例1と同様に、一体化基材を350mm×350mmサイズでカットし、同方向に4枚積層して成形した。
実施例4と比較する目的で、不織布を一体化せず、炭素繊維のみを用いた以外は実施例4と同じ方法で一体化基材を作成し、評価を行い、結果を表2にまとめた。
不織布として、実施例3に用いた融点が260℃の高融点ナイロン繊維100%からなる、目付が8g/m2のスパンボンドタイプ不織布を用い、強化繊維基材に一体化せず、単に合わせた状態でコンポジットの作成、評価を行い、その結果を表2に示した。
実施例4で用いた強化繊維基材に、実施例3で用いた粘着剤を3g/m2塗布し、融点が260℃の高融点ナイロン繊維100%からなる、目付が8g/m2のスパンボンドタイプの不織布を接着させて一体化し、実施例4と同様の方法で硬化板の作成、評価を行った。結果を表2にまとめた。
不織布として比較例3で用いた、融点が約140℃のナイロンからなる目付が10g/m2のメルトブロー長繊維不織布を用い、実施例4に用いた強化繊維基材と合わせてホットローラによる加熱・圧着で接着させて一体化基材とし、実施例4と同じ方法でコンポジット特性の評価を行い、結果を表2にまとめた。
2:強化繊維基材
3:不織布
4:強化繊維糸条
5:よこ方向補助糸
6:たて方向補助糸
7:緯糸
8:0°方向に配向した強化繊維糸条
9:90°方向に配向した強化繊維糸条
10:−45°方向に配向した強化繊維糸条
11:+45°方向に配向した強化繊維糸条
12:ステッチ糸
13:不織布の繊維
14:型
15:バルブ
16:ピールプライ
17:媒体
18:吸引口
19:エッジ・ブリーザ
20:バッグフイルム
21:シール材
22:吐出口
23:バー(A群)
24:バー(B群)
25:芯鞘型繊維
26:芯鞘型繊維の鞘部
27:芯鞘型繊維の芯部
Claims (25)
- 強化繊維からなるシート状の強化繊維基材の少なくとも片面に、短繊維からなる不織布が積層され、該不織布を形成する短繊維が該強化繊維基材に貫通することにより、該強化繊維基材と該不織布が一体化されていることを特徴とする複合強化繊維基材。
- 強化繊維からなるシート状の強化繊維基材の少なくとも片面に、不織布が積層され、該不織布が該強化繊維基材と粘着剤によって一体化されている複合強化繊維基材。
- 強化繊維からなるシート状の強化繊維基材の少なくとも片面に、不織布が積層され、該不織布を構成する繊維のうち5〜50重量%が低融点繊維であり、強化繊維基材と不織布が熱融着により一体化されていることを特徴とする複合強化繊維基材。
- 前記強化繊維基材における強化繊維糸条の繊度が550〜270000デシテックスであって、かつ該強化繊維1本あたりのフィラメント数が1000〜400000本である請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 前記強化繊維基材における強化繊維糸条の繊度が550〜23000デシテックスである請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 前記強化繊維基材の目付が100〜2000g/m2である請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 前記強化繊維基材を構成する織物のカバーファクターが、95%以上である特許請求項1ないし3のいずれかに記載の複合強化基材。
- 前記不織布に低融点の熱可塑性ポリマーからなる低融点繊維が含まれている請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 前記不織布に芯鞘型繊維が含まれており、該芯鞘型繊維において芯部の占める割合が、芯鞘型繊維断面積の30から70%である請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 前記芯鞘型繊維は芯部がナイロン6またはナイロン66であり、鞘部が共重合ナイロンである請求項9に記載の複合強化繊維基材。
- 前記不織布の繊維目付が5〜30g/m2の範囲である請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 前記強化繊維基材は、強化繊維糸条が該基材の長さ方向に配列してなる一方向シートである請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 前記強化繊維基材が、該基材の長さ方向に強化繊維糸条が配列し、幅方向に該強化繊維糸条より細い補助糸が配列し、織組織している一方向織物である請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 前記一方向シートまたは一方向織物において、強化繊維糸条と強化繊維糸条の間に0.1〜5mmの隙間を設けて、該強化繊維糸条が長さ方向に配列した請求項12または13に記載の複合強化繊維基材。
- 前記強化繊維基材は、該基材の長さ方向および幅方向に強化繊維糸条が配列し、織組織している二方向織物である請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 前記二方向織物において、長さ方向および幅方向の少なくとも一方の強化繊維糸条が扁平な強化繊維糸条であって、該扁平な強化繊維糸条の糸幅が4〜30mm、糸厚みが0.1〜1.0mmの範囲にある請求項15記載の複合強化繊維基材。
- 前記強化繊維基材が、少なくとも2群の強化繊維糸条を交差させ、ステッチ糸で縫合してなるステッチ布帛である請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 強化繊維が炭素繊維である請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 前記不織布において、空隙部の占める割合が不織布全体の面積の30%〜95%である請求項1ないし3のいずれかに記載の複合強化繊維基材。
- 粘着剤の使用量が1〜10g/m2である請求項2に記載の複合強化繊維基材。
- 請求項1ないし20のいずれかに記載の複合強化繊維基材を、強化繊維基材と不織布とが交互になるように多数枚積層したことを特徴とするプリフォーム。
- 前記複合強化基材同士が不織布に含まれる低融点繊維の融着により一体化されている請求項21に記載のプリフォーム。
- 前記複合強化基材同士が粘着剤により一体化されている請求項21に記載のプリフォーム。
- 請求項21ないし23のいずれかに記載のプリフォームをバッグフイルムで覆い、内部を真空状態にして樹脂を注入し、複合強化繊維基材に樹脂を含浸させた後、樹脂を硬化させることを特徴とする繊維強化プラスチックの製造方法。
- 雄型と雌型によって形成されるキャビティのなかに請求項21ないし23のいずれかに記載のプリフォームを設置し、キャビティ内を真空状態にして樹脂を注入し、複合強化繊維基材に樹脂を含浸させた後、樹脂を硬化させることを特徴とする繊維強化プラスチックの製造方法。
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WO2021095623A1 (ja) * | 2019-11-11 | 2021-05-20 | 東レ株式会社 | 炭素繊維テープ材料、ならびにそれを用いた強化繊維積層体および成形体 |
WO2021199289A1 (ja) * | 2020-03-31 | 2021-10-07 | 三菱重工業株式会社 | ドライテープ、幅広ドライテープおよびドライテープの製造方法 |
KR20220135902A (ko) * | 2021-03-31 | 2022-10-07 | 도레이첨단소재 주식회사 | 복합재료를 이용한 조립형 타워크레인 마스트 |
KR102477701B1 (ko) * | 2021-03-31 | 2022-12-13 | 도레이첨단소재 주식회사 | 복합재료를 이용한 조립형 타워크레인 마스트 |
JP2024527840A (ja) * | 2021-07-26 | 2024-07-26 | ダウ グローバル テクノロジーズ エルエルシー | 不織布強化を有する多層複合材 |
WO2023095787A1 (ja) * | 2021-11-29 | 2023-06-01 | 東レ株式会社 | 多孔質体 |
JP7367883B1 (ja) * | 2021-11-29 | 2023-10-24 | 東レ株式会社 | 多孔質体 |
WO2023195383A1 (ja) * | 2022-04-06 | 2023-10-12 | 東レ株式会社 | 炭素繊維複合材料 |
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EP1125728A1 (en) | 2001-08-22 |
AU760808B2 (en) | 2003-05-22 |
AU2576400A (en) | 2000-10-09 |
JP4491968B2 (ja) | 2010-06-30 |
EP1125728B1 (en) | 2011-10-05 |
WO2000056539A1 (fr) | 2000-09-28 |
EP1125728A4 (en) | 2003-01-08 |
US6995099B1 (en) | 2006-02-07 |
CA2333151A1 (en) | 2000-09-28 |
JP4947163B2 (ja) | 2012-06-06 |
CA2333151C (en) | 2009-08-18 |
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